Fix modification checks and make sure to use UTC (#14347)

src/Jellyfin.Database/Jellyfin.Database.Implementations/Entities/BaseItemImageInfo.cs

@@ -22,7 +22,7 @@ public class BaseItemImageInfo
     /// <summary>
     /// Gets or Sets the time the image was last modified.
     /// </summary>
-    public DateTime DateModified { get; set; }
+    public DateTime? DateModified { get; set; }
 
     /// <summary>
     /// Gets or Sets the imagetype.

src/Jellyfin.Database/Jellyfin.Database.Implementations/QueryPartitionHelpers.cs

@@ -82,7 +82,7 @@ public static class QueryPartitionHelpers
     /// <typeparam name="TEntity">The entity to load.</typeparam>
     /// <param name="partitionInfo">The source query.</param>
     /// <param name="partitionSize">The number of elements to load per partition.</param>
-    /// <param name="cancellationToken">The cancelation token.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
     /// <returns>A enumerable representing the whole of the query.</returns>
     public static async IAsyncEnumerable<TEntity> PartitionAsync<TEntity>(this ProgressablePartitionReporting<TEntity> partitionInfo, int partitionSize, [EnumeratorCancellation] CancellationToken cancellationToken = default)
     {
@@ -98,7 +98,7 @@ public static class QueryPartitionHelpers
     /// <typeparam name="TEntity">The entity to load.</typeparam>
     /// <param name="partitionInfo">The source query.</param>
     /// <param name="partitionSize">The number of elements to load per partition.</param>
-    /// <param name="cancellationToken">The cancelation token.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
     /// <returns>A enumerable representing the whole of the query.</returns>
     public static async IAsyncEnumerable<TEntity> PartitionEagerAsync<TEntity>(this ProgressablePartitionReporting<TEntity> partitionInfo, int partitionSize, [EnumeratorCancellation] CancellationToken cancellationToken = default)
     {
@@ -115,7 +115,7 @@ public static class QueryPartitionHelpers
     /// <param name="query">The source query.</param>
     /// <param name="partitionSize">The number of elements to load per partition.</param>
     /// <param name="progressablePartition">Reporting helper.</param>
-    /// <param name="cancellationToken">The cancelation token.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
     /// <returns>A enumerable representing the whole of the query.</returns>
     public static async IAsyncEnumerable<TEntity> PartitionAsync<TEntity>(
         this IOrderedQueryable<TEntity> query,
@@ -154,7 +154,7 @@ public static class QueryPartitionHelpers
     /// <param name="query">The source query.</param>
     /// <param name="partitionSize">The number of elements to load per partition.</param>
     /// <param name="progressablePartition">Reporting helper.</param>
-    /// <param name="cancellationToken">The cancelation token.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
     /// <returns>A enumerable representing the whole of the query.</returns>
     public static async IAsyncEnumerable<TEntity> PartitionEagerAsync<TEntity>(
         this IOrderedQueryable<TEntity> query,

src/Jellyfin.Database/Jellyfin.Database.Providers.Sqlite/Migrations/20250622170802_BaseItemImageInfoDateModifiedNullable.cs

@@ -0,0 +1,37 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Jellyfin.Server.Implementations.Migrations
+{
+    /// <inheritdoc />
+    public partial class BaseItemImageInfoDateModifiedNullable : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<DateTime>(
+                name: "DateModified",
+                table: "BaseItemImageInfos",
+                type: "TEXT",
+                nullable: true,
+                oldClrType: typeof(DateTime),
+                oldType: "TEXT");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<DateTime>(
+                name: "DateModified",
+                table: "BaseItemImageInfos",
+                type: "TEXT",
+                nullable: false,
+                defaultValue: new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified),
+                oldClrType: typeof(DateTime),
+                oldType: "TEXT",
+                oldNullable: true);
+        }
+    }
+}

src/Jellyfin.Database/Jellyfin.Database.Providers.Sqlite/Migrations/JellyfinDbModelSnapshot.cs

@@ -418,7 +418,7 @@ namespace Jellyfin.Server.Implementations.Migrations
                     b.Property<byte[]>("Blurhash")
                         .HasColumnType("BLOB");
 
-                    b.Property<DateTime>("DateModified")
+                    b.Property<DateTime?>("DateModified")
                         .HasColumnType("TEXT");
 
                     b.Property<int>("Height")

src/Jellyfin.LiveTv/Channels/ChannelManager.cs

@@ -1166,7 +1166,7 @@ namespace Jellyfin.LiveTv.Channels
                 }
             }
 
-            if (isNew || forceUpdate || item.DateLastRefreshed == default)
+            if (isNew || forceUpdate || item.DateLastRefreshed == DateTime.MinValue)
             {
                 _providerManager.QueueRefresh(item.Id, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), RefreshPriority.Normal);
             }